Principles of invertebrate paleontology /
Twenhofel, William H. 1875-1957.
Principles of invertebrate paleontology / by Robert R. Shrock and William H. Twenhofel. - 2d ed. - New York : McGraw-Hill, 1953. - 816 p. : ill. ; 24 cm.
'A revised and enlarged edition of Twenhofel and Shrock, Invertebrate paleontology.'
Invertebrates, Fossil.
Principles of invertebrate paleontology / by Robert R. Shrock and William H. Twenhofel. - 2d ed. - New York : McGraw-Hill, 1953. - 816 p. : ill. ; 24 cm.
'A revised and enlarged edition of Twenhofel and Shrock, Invertebrate paleontology.'
Invertebrates, Fossil.
